And I Darken by Kiersten White

And by that I mean taking a well-known figure like Vlad the Impaler and gender bending him. This novel is the first in The Conquerors Saga.

Lada is vicious, slightly mad, and has a weird dependence on her little brother, Radu. The novel spans a good few years, beginning with her trade to the Ottoman Empire in exchange for her father’s obedience. Lada struggles to look out for her brother in an unfamiliar place in a time when being a woman was already a strike against her. Lada has to watch out for conniving mothers, unknown love triangles, asshole fathers and, you know, being a teenager.